DE2404524A1 - SERVO VALVE - Google Patents
SERVO VALVEInfo
- Publication number
- DE2404524A1 DE2404524A1 DE19742404524 DE2404524A DE2404524A1 DE 2404524 A1 DE2404524 A1 DE 2404524A1 DE 19742404524 DE19742404524 DE 19742404524 DE 2404524 A DE2404524 A DE 2404524A DE 2404524 A1 DE2404524 A1 DE 2404524A1
- Authority
- DE
- Germany
- Prior art keywords
- servo valve
- grooves
- valve
- operating fluid
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0708—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides comprising means to avoid jamming of the slide or means to modify the flow
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Servomotors (AREA)
- Fluid-Pressure Circuits (AREA)
Description
240452A240452A
ELEKTRO-MECHANIK GMBH
596O Olpe, BiggeseeELEKTRO-MECHANIK GMBH
596O Olpe, Biggesee
F 74 / 1F 74/1
25. Januar 1974January 25, 1974
Ebert / asEbert / as
Bei allen bisher bekannten Servoventilen wird der Flüssigkeitsdruck an der Druckanschlußleitung des Servoventiles unabhängig von der Aussteuerung des Servoventiles konstant gehalten. Das bedeutet bei einer Flüssigkeitspumpe mit konstantem Förderstrom eine konstante Leistung, die bei Aussteuern des Servoventiles an den Verbraucher weitergegeben wird. In Ruhestellung des Servoventiles, d.h. bei Null-Aussteuerung wird die gesamte Leistung in Verlustwärme umgesetzt, da der gesamte Flüssigkeitsstrom der Pumpe über das auf den gewünschten Flüssigkeitsdruck eingestellte Überdruckventil zum Flüssigkeits-In all previously known servo valves, the fluid pressure on the pressure connection line of the servo valve regardless of the Control of the servo valve kept constant. In the case of a liquid pump with a constant flow rate, this means a constant flow rate Power that is passed on to the consumer when the servo valve is actuated. In the rest position of the servo valve, i.e. at Zero modulation, the entire power is converted into heat loss, because the entire liquid flow of the pump is on the desired Fluid pressure set pressure relief valve for fluid
509836/0012509836/0012
- 2 - F 74 / 1 - 2 - F 74/1
behälter zurückfließen muß. Da bei Verwendung eines Servoventiles in einem geschlossenen Regelkreis das Servoventil sehr oft nicht ausgesteuert ist, weil keine Regelabweichung vorhanden ist und somit keine Energie an das Stellglied abgegeben wird, so bedeutet die Speisung des Regelsystems mit Flüssigkeit konstanter Leistung einen erheblichen Energieverlust.container must flow back. Because when using a servo valve in a closed control loop, the servo valve is very often not controlled because there is no control deviation and thus If no energy is delivered to the actuator, then the supply of the control system with fluid of constant power means a considerable amount Loss of energy.
Die Erfindung hat sich daher die Aufgabe gestellt, ein Servoventil zu schaffen, bei dem die in Null-Aussteuerung des Ventiles erzeugte Verlustwärme erheblich vermindert wird. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Steuerkolbren bei Null-Aussteuerung des Ventiles im Bereich der Abdeckung der Zulaufleitung für die Betriebsflüssigkeit mit Nuten versehen ist, die einen Durchlaß der Betriebsflüssigkeit nahezu drucklos ermöglichen.The invention has therefore set itself the task of creating a servo valve in which the heat loss generated in the zero modulation of the valve is considerably reduced. This object is achieved according to the invention in that the control piston is provided with grooves in the area of the cover of the supply line for the operating fluid when the valve is actuated to zero, which grooves allow the operating fluid to pass through almost without pressure.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt.An embodiment of the invention is shown schematically in the drawing shown.
Figur 1 zeigt einen Querschnitt und Figur 2 eine Draufsicht auf den Hydraulikteil eines Vierwege-Servoventiles.Figure 1 shows a cross section and Figure 2 is a plan view of the Hydraulic part of a four-way servo valve.
In Figur 1 ist mit 1 die Aufnahmehülse bezeichnet, in der achsial verschiebbar der Steuerkolben 2 angeordnet ist. A und B sind Leitungen, die zu den Verbrauchern führen. Die Zulaufleitung für die Betriebsflüssigkeit ist mit 5 und die Rückführungsleitung mit 8 bezeichnet.In Figure 1, 1 denotes the receiving sleeve, in which axially displaceable the control piston 2 is arranged. A and B are lines that lead to the consumers. The feed line for the operating fluid is denoted by 5 and the return line by 8.
In Null-Aussteuerung des Servoventiles strömt die in der Zulaufleitung 7 ankommende Betriebsflüssigkeit durch die Nuten 3 und den Kanal 4 nahezu drucklos zu einem nicht dargestellten Flüssigkeitsbehälter.In the zero modulation of the servo valve, the flows in the supply line 7 incoming operating fluid through the grooves 3 and the channel 4 almost pressureless to a liquid container, not shown.
509836/001 2509836/001 2
- 3 - F 74 / 1 - 3 - F 74/1
Die Querschnitte der Nuten 3 und des Kanals 4 sind so gewählt, daß einerseits eine kleine Verlustleistung zur Aufrechterhaltung der Flüssigkeitstemperatur vorhanden ist und andererseits das gesamte Hydrauliksystem mit dem an den Anschlüssen A und B angeschlossenen Verbraucher unter einem Restdruck bleibt. Vird jedoch beispielsweise der Steuerkolben 2 nach einer Seite stetig ausgelenkt, so werden die Querschnitte der Nuten 3 und des Kanals 4 entsprechend der Seitenauslenkung des Steuerkolbens verkleinert und gleichzeitig das Vierwegeventil stetig über die Steuerkanten 6 geöffnet. Die Steuerkanten 6 und die Nuten 3 sind so aufeinander abgestimmt, daß die Summe der Flüssigkeitsströrae durch die Steuerkante 6 und die Nuten 3 gleich dem Pumpenförderstrom ist. Zwischen Null-Aussteuerung und Vollaussteuerung des Servoventiles stellt sich ein Betriebsflüssigkeitsdruck von einem minimalen Wert, dem sogenannten Umlaufdruck über Zulaufleitung 7, Nuten 3 und Kanal 4 zum Flüssigkeitsbehälter und einem maximalen Wert, eingestellt am Überdruckventil, je nach Verbraucherlast, ein.The cross sections of the grooves 3 and the channel 4 are chosen so that on the one hand, a small power loss to maintain the Fluid temperature is present and on the other hand the entire hydraulic system with the one connected to ports A and B. Consumer remains under a residual pressure. However, for example If the control piston 2 is continuously deflected to one side, the cross-sections of the grooves 3 and of the channel 4 are corresponding to the lateral deflection of the control piston is reduced and at the same time the four-way valve is continuously opened via the control edges 6. The control edges 6 and the grooves 3 are coordinated so that the sum of the liquid flows through the control edge 6 and the grooves 3 is equal to the Pump flow rate is. Between zero modulation and full modulation of the servo valve there is an operating fluid pressure of a minimum value, the so-called circulation pressure via inlet line 7, Grooves 3 and channel 4 to the liquid container and a maximum value, set on the pressure relief valve, depending on the consumer load.
Der Vorteil der Erfindung besteht darin, daß durch die erheblich geringere Verlustwärme das Hydrauliknetzgerät kleiner ausgeführt werden kann, sowie FlUssigksitsvolumen und schließlich auch Energiekosten gespart werden.The advantage of the invention is that by the considerably lower Heat loss, the hydraulic power supply unit can be made smaller, as well as liquid volume and finally also energy costs be saved.
609836/001 2609836/001 2
Claims (2)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742404524 DE2404524C2 (en) | 1974-01-31 | 1974-01-31 | Multi-way servo valve |
CH38275A CH576076A5 (en) | 1974-01-31 | 1975-01-14 | |
GB365175A GB1493641A (en) | 1974-01-31 | 1975-01-28 | Servo valve |
FR7502716A FR2260049B1 (en) | 1974-01-31 | 1975-01-29 | |
IT1975575A IT1031291B (en) | 1974-01-31 | 1975-01-30 | MULTI-TYPE SERVOVALVE FOR COURSES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742404524 DE2404524C2 (en) | 1974-01-31 | 1974-01-31 | Multi-way servo valve |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2404524A1 true DE2404524A1 (en) | 1975-09-04 |
DE2404524C2 DE2404524C2 (en) | 1982-04-01 |
Family
ID=5906161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19742404524 Expired DE2404524C2 (en) | 1974-01-31 | 1974-01-31 | Multi-way servo valve |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH576076A5 (en) |
DE (1) | DE2404524C2 (en) |
FR (1) | FR2260049B1 (en) |
GB (1) | GB1493641A (en) |
IT (1) | IT1031291B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2501818A1 (en) * | 1981-03-11 | 1982-09-17 | Elmeg | PROGRESSIVE DISTRIBUTOR WITH ROTATING OR SLIDING DRAWER |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE868530C (en) * | 1951-04-29 | 1953-02-26 | Askania Werke Ag | Pressure medium control for indirectly acting hydraulic regulator |
DE1116954B (en) * | 1959-02-26 | 1961-11-09 | Rheinstahl Hanomag Ag | Control slide for a single acting servomotor, especially for power lift systems on farm tractors |
DE1253541B (en) * | 1963-10-24 | 1967-11-02 | Sigma | Control spool with pressure-dependent reset |
DE2248891A1 (en) * | 1971-10-26 | 1973-05-03 | Koehring Co | VALVE PISTON FOR HYDRAULIC VALVE VALVE |
DE2335702A1 (en) * | 1972-07-13 | 1974-01-24 | Borg Warner | HYDRAULIC SYSTEM |
-
1974
- 1974-01-31 DE DE19742404524 patent/DE2404524C2/en not_active Expired
-
1975
- 1975-01-14 CH CH38275A patent/CH576076A5/xx not_active IP Right Cessation
- 1975-01-28 GB GB365175A patent/GB1493641A/en not_active Expired
- 1975-01-29 FR FR7502716A patent/FR2260049B1/fr not_active Expired
- 1975-01-30 IT IT1975575A patent/IT1031291B/en active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE868530C (en) * | 1951-04-29 | 1953-02-26 | Askania Werke Ag | Pressure medium control for indirectly acting hydraulic regulator |
DE1116954B (en) * | 1959-02-26 | 1961-11-09 | Rheinstahl Hanomag Ag | Control slide for a single acting servomotor, especially for power lift systems on farm tractors |
DE1253541B (en) * | 1963-10-24 | 1967-11-02 | Sigma | Control spool with pressure-dependent reset |
DE2248891A1 (en) * | 1971-10-26 | 1973-05-03 | Koehring Co | VALVE PISTON FOR HYDRAULIC VALVE VALVE |
DE2335702A1 (en) * | 1972-07-13 | 1974-01-24 | Borg Warner | HYDRAULIC SYSTEM |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2501818A1 (en) * | 1981-03-11 | 1982-09-17 | Elmeg | PROGRESSIVE DISTRIBUTOR WITH ROTATING OR SLIDING DRAWER |
DE3109116A1 (en) * | 1981-03-11 | 1982-11-04 | Elektro-Mechanik Gmbh, 5963 Wenden | CONTINUOUS VALVE WITH ROTARY VALVE OR LENGTH VALVE |
Also Published As
Publication number | Publication date |
---|---|
FR2260049A1 (en) | 1975-08-29 |
IT1031291B (en) | 1979-04-30 |
CH576076A5 (en) | 1976-05-31 |
FR2260049B1 (en) | 1978-07-13 |
DE2404524C2 (en) | 1982-04-01 |
GB1493641A (en) | 1977-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8125 | Change of the main classification | ||
D2 | Grant after examination |